遠心型血液ポンプ羽根車の軸支持部に作用するふれまわり流体力の数値解析(流体工学,流体機械)  [in Japanese] A Numerical Analysis of Rotordynamic Fluid Forces on an Artificial Heart Pump Shaft Support Part(Fluids Engineering)  [in Japanese]

In centrifugal pumps for artificial hearts, a magnetic drive and lightly loaded journal bearing system are often used to avoid leakage and to minimize the damage on blood cells. In such system, the rigidity of the bearing is small and an impeller usually rotates over the critical speed. For such cases, rotordynamic fluid forces play an important role for the stability of operation. The present paper reports about the results of numerical studies on the rotordynamic fluid forces on the shaft support part. For the numerical calculations, a commercial code based on RANS and a bulk flow model have been used.